Perkins 1706EA-E93TA - Reference Information Section; Engine Ratings

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Reference Information
Section
Engine Ratings
Engine Rating Conditions
All engine ratings are based on“SAE J1349”.
Ratings relate to the standard conditions of
“AS1501”, of “ISO3046/1”, of “DIN6271”, and of
“BS5514”.
The engine ratings are gross output ratings.
Gross Output Ratings – The total output capability
of the engine that is equipped with standard
accessories.
Standard accessories include the following
components:
• Oil pumps
• Fuel pumps
• Water pumps
Subtract the power that is required to drive auxiliary
components from the gross output. This equation will
produce the net power that is available for the
external load (flywheel).
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Engine Rating Definitions
In selecting a rating for a specific application, the
most important consideration is the time that is spent
at full throttle. These rating definitions identify the
percent of time at full throttle. The definitions also
identify the corresponding times below rated rpm.
Refer to this Operation and Maintenance Manual,
“Configuration Parameters” for information about the
rating for this engine.
Note: The examples of the applications are only for
reference. For an exact determination of the
appropriate rating, follow the OEM specifications or
consult your Perkins dealer.
Table 23
Engine Rating Information
Perform-
ance
Rating
Load
Factor
Time at Rated Load
(1)
Examples of
Applications
Overall
Any One
Instance
A 100% 100% n/a
Pipe line
pumping
Ventilation
B 85% 75% n/a
Irrigation pumps
Drilling
applications
Plant air
compressors
C 70% 50%
Less than1
hour
Fire pumps
Chippers
Rock crushers
Portable air
compressors
D 50% 10%
Less than 30
minutes
Snowblowers
Cranes
Water well drills
E 35% 5%
Less than 15
minutes
Standby centrifu-
gal pumps
Oil well servicing
(1)
Both the overall time at rated load and the time the engine is
operated in any one instance must be considered.
NOTICE
Operating engines above the rating definitions can
result in shorter service life before overhaul.
M0087475-06 131
Reference Information Section
Engine Ratings